Aerobic exercise combined with tai chi may reduce Positive and Negative Syndrome Scale scoresExercise and yoga may help manage symptoms of schizophrenia

This network meta-analysis evaluated the efficacy of various exercise therapies, including aerobic exercise (AE), yoga, and tai chi, for the management of schizophrenia. The study included a total population of 2628 individuals with schizophrenia. The primary outcome measured was the Positive and Negative Syndrome Scale scores, while secondary outcomes included the Scale for the Assessment of Negative Symptoms, the Scale for the Assessment of Positive Symptoms, and the Inpatient Psychiatric Rehabilitation Outcome Scale. The analysis aimed to rank the comparative effectiveness of these non-pharmacological interventions against control therapies.

Regarding the primary outcome, the analysis indicated that aerobic exercise (AE) combined with tai chi may have a higher likelihood of reducing Positive and Negative Syndrome Scale scores, with a SUC_ranking probability of 88.2%. For the secondary outcomes, yoga demonstrated a higher probability in reducing scores on the Scale for the Assessment of Negative Symptoms (89.6%) and the Scale for the Assessment of Positive Symptoms (86.7%). Additionally, tai chi was found to be more likely in lowering scores on the Inpatient Psychiatric Rehabilitation Outcome Scale, with a SUC_ranking probability of 76.5%.

Safety and tolerability data were not reported in the included studies. Consequently, specific adverse event rates, serious adverse events, or discontinuation rates for aerobic exercise, yoga, or tai chi were not available for analysis. The data provided a comparative ranking of these modalities rather than a direct head-to-head quantification of effect sizes or confidence intervals for each specific intervention.

These results suggest that exercise-based interventions may offer a viable complementary approach to traditional pharmacological treatments for schizophrenia. While the study highlights specific strengths for different modalities—such as yoga for specific symptom scales and tai chi for rehabilitation outcomes—the evidence is not yet robust enough to establish a definitive clinical hierarchy. The findings suggest that these therapies may be effective in reducing symptoms in patients with schizophrenia, but clinicians should consider the specific clinical goals when selecting an intervention.

Several methodological limitations impact the certainty of these findings. These include small sample sizes in some component studies, significant heterogeneity in the specific exercise protocols used across different trials, and a moderate risk of bias in some included studies. These factors necessitate a cautious interpretation of the SUC_ranking probabilities. Furthermore, the lack of standardized reporting for exercise duration, intensity, and frequency across the included studies complicates the ability to provide specific dosing recommendations.

Clinical implications suggest that exercise therapy, including aerobic exercise, yoga, and tai chi, may be integrated into treatment plans for schizophrenia. However, the lack of standardized protocols means that the specific 'dose' of exercise required to achieve the noted improvements remains unclear. Questions remain regarding the optimal frequency and duration of these exercises, the specific population characteristics that respond best to each modality, and the long-term sustainability of these interventions in a community setting. Further high-quality, homogeneous trials are needed to clarify these points.